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Message-ID: <20080713115818.GA7517@elf.ucw.cz> Date: Sun, 13 Jul 2008 13:58:19 +0200 From: Pavel Machek <pavel@...e.cz> To: Arjan van de Ven <arjan@...ux.intel.com> Cc: Vegard Nossum <vegard.nossum@...il.com>, Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: v2.6.26-rc7: Negative powertop values On Tue 2008-07-08 06:52:51, Arjan van de Ven wrote: > On Sun, 6 Jul 2008 21:48:45 +0200 > Pavel Machek <pavel@...e.cz> wrote: > > > > > > > [I assume you know that doing a software unplug you burn more power > > > than by leaving the cpu idle] > > > > We should really fix that one day... > > yeah but it's incredibly hard to get right (in the light of the bios > constantly changing what our allowed C-states are)... and the best case What can happen there? So BIOS decides C4 may no longer be cool idea because we have AC power now, but that does not mean C4 stops working, right? How is changing allowed C-states list supposed to work, anyway? I mean, we may be in one of those on other CPU when BIOS decides to change the list... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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